High Response CO Sensor Based on a Polyaniline/SnO<sub>2</sub> Nanocomposite
oleh: Kai-Syuan Jian, Chi-Jung Chang, Jerry J. Wu, Yu-Cheng Chang, Chien-Yie Tsay, Jing-Heng Chen, Tzyy-Leng Horng, Gang-Juan Lee, Lakshmanan Karuppasamy, Sambandam Anandan, Chin-Yi Chen
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2019-01-01 |
Deskripsi
A polyaniline (PANI)/tin oxide (SnO<sub>2</sub>) composite for a CO sensor was fabricated using a composite film composed of SnO<sub>2</sub> nanoparticles and PANI deposition in the present study. Tin oxide nanoparticles were synthesized by the sol-gel method. The SnO<sub>2</sub> nanoparticles provided a high surface area to significantly enhance the response to the change in CO concentration at low operating temperature (<75 °C). The excellent sensor response was mainly attributed to the relatively good properties of PANI in the redox reaction during sensing, which produced a great resistance difference between the air and CO gas at low operating temperature. Therefore, the combination of <i>n</i>-type SnO<sub>2</sub> nanoparticles with a high surface area and a thick film of conductive PANI is an effective strategy to design a high-performance CO gas sensor.